Hi @Amar-Azure-Practice
Thank You for posting in Q & A.
Scale Out is depending on your pricing tier, if it is Premium V2 pricing tier Max Scale out is 30 instances.
There are two workflows for scaling, scale up and scale out.
Scale out: Increase the number of VM instances that run your app. You can scale out to as many as 30 instances, depending on your pricing tier. App Service Environments in Isolated tier further increases your scale-out count to 100 instances.
The scale settings take only seconds to apply and affect all apps in your App Service plan. They don't require you to change your code or redeploy your application.
Scale up: Get more CPU, memory, disk space, and extra features like dedicated virtual machines (VMs), custom domains and certificates, staging slots, autoscaling, and more. You scale up by changing the pricing tier of the App Service plan that your app belongs to
how to set up your Autoscale settings for your resource in the Microsoft Azure portal.
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